xvfb-chrome

What This Skill Does

The xvfb-chrome skill provides a robust framework for managing Google Chrome instances on headless Linux environments. It leverages Xvfb (X Virtual Framebuffer) to create a virtual display, allowing browsers that normally require a GUI to function seamlessly on CLI-only servers. By integrating with the chrome-devtools MCP, it transforms your server into a powerful browser automation engine, capable of navigating, interacting, and extracting data from web pages.

Installation

To install this skill, use the following command in your OpenClaw environment: clawhub install openclaw/skills/skills/codinglink/xvfb-chrome Ensure you have Google Chrome and xvfb pre-installed on your Linux system before initiating the installation.

Use Cases

• Automated Web Scraping: Navigate complex websites that require JavaScript rendering, which simple HTTP requests cannot handle.
• Visual Testing: Capture high-quality screenshots of web applications at specific resolutions (e.g., 1080p) for visual regression testing.
• Browser Interaction: Automate workflows such as filling out forms, clicking buttons, and handling authentication loops using chrome-devtools.
• Server-Side UI Automation: Run legacy web-based internal tools that require a visual browser interface within a restricted server environment.

Example Prompts

1. "Start a new Chrome session on display 99, navigate to example.com, and take a full-page screenshot saved to /tmp/screenshot.png."
2. "I need to automate a login process; please connect to the running Chrome instance on port 9222 and find the element with ID 'login-btn' to perform a click."
3. "Set up a 1920x1080 virtual display for Chrome and list all currently open browser tabs using the devtools MCP."

Tips & Limitations

• Performance: Always remember to use --disable-gpu and --no-sandbox flags when running Chrome on a server to avoid crash loops and permission errors.
• Cleanup: Regularly clean up the /tmp/chrome-profile directory to prevent disk space issues, and use pkill commands to ensure old browser processes do not hog system resources.
• Display Management: Utilize the -a flag with xvfb-run to avoid conflicts when multiple automation tasks are running on the same machine.
• Headless Mode: Use --headless=new for high-performance scraping, but switch to standard mode when you need full interaction capabilities via DevTools.